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Conclusions for target contouring
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GTV, CTV, ITV concept is complex
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CTV consists of primary tumor and nodal components
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International consensus exists for contouring guidelines
with small matters of debate
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ITV concept is developed to account for target and OAR
motion and deformation
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ITV-T can be individualized
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Nodes move a little, too!
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Position verification issues will be addressed later!!